Randall2961 on "[Plugin: Search & Replace] 500 - Internal Server Error"

Hi

I'm on 4.2.2 and I've just installed Search and Replace. It seemed to install properly and it opens on the following page: ...wp-admin/tools.php?page=search-and-replace%2Fsearch-and-replace.php

However, when I try and run any search using the top search only box I get a "500 - Internal server error" every time.

Thanks and kind regards
Randall

https://wordpress.org/plugins/search-and-replace/